AURETR045
Inspect, service and repair DC electric motor drive systems


Application

This unit describes the performance outcomes required to inspect, service and repair direct current (DC) electric motor drive systems in vehicles, vessels or machinery. It involves preparing for the task, inspecting DC electric motor drive systems, repairing the systems, and completing workplace processes and documentation, including associated recommendations for further action.

It applies to those working in the automotive service and repair industry. The DC electric motor drive systems include those in agricultural machinery, heavy commercial vehicles, light vehicles, vessels, mobile plant machinery, motorcycles or outdoor power equipment.

No licensing, legislative, regulatory or certification requirements apply to this unit at the time of publication.


Elements and Performance Criteria

Elements

Elements describe the essential outcomes.

Performance Criteria

Performance criteria describe the performance needed to demonstrate achievement of the element. Where bold and italicised text is used, further information is detailed in the range of conditions section.

1. Prepare to inspect, service and repair DC electric motor drive system

1.1 Job requirements are determined according to workplace instructions

1.2 Inspection and servicing procedures are accessed and interpreted

1.3 Hazards associated with the work are identified and risks are managed

1.4 Tools, equipment and materials are selected and checked for serviceability

2. Inspect and test system

2.1 System is inspected and tested according to workplace procedures and safety requirements

2.2 Circuits are tested according to workplace procedures and without causing damage to components or systems

2.3 Inspection results are compared with manufacturer specifications

2.4 Inspection findings are reported according to workplace procedures, including recommendations for required repairs or adjustments

3. Service and repair system

3.1 System is serviced and repaired according to manufacturer and component specifications, workplace procedures, and safety and environmental requirements, and without causing damage to components or systems

3.2 System is performance tested and final adjustments are made

3.3 Post-repair testing is carried out to confirm system is operating to manufacturer specifications, any reported problems are resolved, and no other problems are present

4. Complete work processes

4.1 Final inspection is made to ensure work is to workplace expectations and vehicle, vessel or machinery is presented ready for use

4.2 Work area is cleaned, waste and non-recyclable materials are disposed of, and recyclable material is collected

4.3 Tools and equipment are checked and stored and any faulty electrical equipment is identified, tagged and isolated according to workplace procedures

4.4 Workplace documentation is processed according to workplace procedures

Evidence of Performance

Before competency can be determined, individuals must demonstrate they can perform the following according to the standards defined in this unit’s elements, performance criteria, range of conditions and foundation skills:

inspect, service and repair three of the following direct current (DC) electric motor drive systems in vehicles, vessels or machinery:

brush commutator motor

stepper motor assembly

brushless hall effect motor

magnetic flux array motor.


Evidence of Knowledge

Individuals must be able to demonstrate knowledge of:

work health and safety (WHS) and occupational health and safety (OHS) requirements relating to inspecting, servicing and repairing DC electric motor drive systems, including procedures for:

selecting and using personal protective equipment (PPE), including clothing, and eye and hand protection

working safely with high current electrical systems

operating principles of DC electric motor drive systems, including:

brush commutator motors, including of:

permanent magnet motor

series motor

shunt motor

compound motor

brushless motors, including:

stepper motors, including rotary position actuators

hall effect motor

magnetic flux array motors

application, purpose and operation of DC electric motor drive systems, including:

power operated windows, door and roofs

power operated seats, mirrors and radio antennas

winches and lifting platforms

rotary position actuators

brushless traction motors

magnetic flux array, including wheel hub motors

inspection procedures for DC electric motor drive systems, including analysing system operation

procedures for testing DC electric motor drive systems, including:

accessing electrical terminals and using test probes without damaging connectors, fuse holders or wiring

procedures for using and operating electrical test equipment, including:

digital multimeters

test lights and probes

oscilloscopes

service and repair procedures for DC electric motor drive systems, including:

component removal and replacement procedures

component and associated system adjustment procedures

post-repair testing procedures of DC electric motor drive systems, including:

confirming that system is operating to manufacturer specifications

confirming that no other problems are present as a result of the repair.


Assessment Conditions

Assessors must satisfy NVR/AQTF assessor requirements.

Competency is to be assessed in the workplace or a simulated environment that accurately reflects performance in a real workplace setting.

Assessment must include direct observation of tasks.

Where assessment of competency includes third-party evidence, individuals must provide evidence that links them to the DC electric motor drive systems that they have inspected, serviced and repaired, e.g. repair orders.

Assessors must verify performance evidence through questioning on skills and knowledge to ensure correct interpretation and application.

The following resources must be made available:

automotive repair workplace or simulated workplace

workplace instructions

manufacturer DC electric drive motor specifications

PPE, including clothing, and eye and hand protection

three different vehicles, vessels or machinery with the DC electric motor drive systems specified in the performance evidence requiring repair

tools, equipment and materials appropriate for inspecting, servicing and repairing DC electric motor drive systems, including multimeter.


Foundation Skills

This section describes those language, literacy, numeracy and employment skills that are essential to performance and are not explicit in the performance criteria.

Skills

Description

Learning skills to:

locate appropriate sources of information efficiently.

Reading skills to:

interpret text, symbols and diagrams from manufacturer specifications and workplace procedures.

Writing skills to:

legibly and accurately fill out workplace documentation when reporting inspection findings, making repair recommendations, and recording parts and material used.

Oral communication skills to:

clarify instructions and report inspection findings to appropriate personnel.

Numeracy skills to:

interpret vehicle electrical measurements and readings on digital and analogue gauges

measure voltage, current and resistance and use basic mathematical operations, including addition and subtraction, to calculate deviations from manufacturer specifications.

Technology skills to:

use specialised tools and electrical test equipment to inspect, service and repair DC electric motor drive systems, including multimeters.


Range Statement

This section specifies work environments and conditions that may affect performance. Essential operating conditions that may be present (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) are included. Bold italicised wording, if used in the performance criteria, is detailed below.

Safety requirements must include:

work health and safety (WHS) and occupational health and safety (OHS) requirements, including procedures for:

selecting and using personal protective equipment (PPE), including clothing, and eye and hand protection

working safely with high current electrical systems.


Sectors

Technical - Electrical and Electronic


Competency Field

Electrical